Frost Dates for Kingsport, TN
In Kingsport, TN, the average last spring frost is around Apr 9 and the average first fall frost around Oct 29, for a growing season of about 203 days. For frost-tender plants, wait until Apr 25, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Kingsport, TN weather station, under 1 mile away, elevation 1,284 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Apr 25 | Oct 15 |
| 20% | Apr 20 | Oct 20 |
| 30% | Apr 16 | Oct 24 |
| 40% | Apr 13 | Oct 26 |
| 50% | Apr 9 | Oct 29 |
| 60% | Apr 6 | Nov 1 |
| 70% | Apr 2 | Nov 2 |
| 80% | Mar 30 | Nov 5 |
| 90% | Mar 25 | Nov 10 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Apr 23 | Oct 20 |
| Frost / freeze (32°F) | Apr 9 | Oct 29 |
| Hard freeze (28°F) | Mar 28 | Nov 6 |
Planting calendar for Kingsport
Transplant Apr 16 – Apr 30
Transplant Apr 23 – May 7
Transplant Apr 23 – May 7
Transplant Apr 16 – Apr 30
Sow or transplant Apr 16 – Apr 30
Sow or transplant Apr 16 – Apr 30
Sow or transplant Apr 23 – May 7
Sow or transplant Mar 12 – Mar 26
Fall sowing Sep 3 – Oct 1
Fall sowing Sep 3 – Sep 24
Fall sowing Aug 20 – Sep 3
Sow or transplant Mar 12 – Mar 26
Fall sowing Aug 20 – Sep 17
Transplant Mar 26 – Apr 9
Fall sowing Aug 6 – Aug 20
Transplant Mar 19 – Apr 2
Fall sowing Aug 6 – Aug 20
Fall sowing Aug 6 – Aug 20
Fall sowing Sep 17 – Oct 8
Fall sowing Aug 20 – Sep 3
Plant Mar 12 – Mar 26
Based on the average last frost (Apr 9) and first frost (Oct 29). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.